Abstract
The sorption process of Co(II) onto nanoparticles of calcium silicate doped with 5% CuO treated by humic acid was evaluated using batch technique. This process follows the second order kinetic model. Equilibrium isotherm models of Co(II) sorption onto the modified composite was 208.91 mg/g. Negative value of free energy change (ΔG0), confirms the spontaneous sorption of Co(II) ions onto the modified composite. The removal efficiency (R%) reached 96.9% using 0.5 g of the modified composite. Therefore, the composite could be used for treatment of radioactive waste containing 60Co.
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